Machine for shaping and pressing shoe parts



July 14, 1936. s. J, FlNN 2,047,259

MACHINE FOR SHAPING AND PRESSING SHOE PARTS Filed Dec. 13, 1934 4- Sheets-Sheet l July 14, 1936. 5 1 f-lNN 2,047,259

MACHINE FOR SHAPING AND PRESSING SHOE PARTS Filed DGO. 13, 1934 4 Sheets-Sheet 2 July 14, 1936. s J, FINN 2,047,259

MACHINE FOR SHAPING AND PRESSING SHOE PARTS Filed Dec. 13, 1954 4 lsheets-Sheet 5 July 14, 1936. s J, NNN 2,047,259

MACHINE FOR SHAPING AND PRESSING SHOE PARTS Filed Dec. 13, 1934 4 Sheets-Sheet 4 l fili Patented July 14, i936 MACHINE FOR SHAPING AND PRESSENG SHE PARTS Sidney li. Finn, Eeverly, Mass., assigner to United Shoe Machinery Corporation, Paterson, N. l., a corporation of New Jersey Application December 13, 1934, Serial No. '757,362

29 Claims.

This invention relates to machines for shaping and pressing shoe parts and, in the embodiment shown for the purpose of illustration, comprises a heated form and a cooperating presser member adapted to give a preliminary transverse curvature to a shoe vamp, for example the vamp portion of a closed unlasted shoe upper, the curvature approximating but preferably being less than that which the vamp will assume when lasted. The machine is therefore adapted for use in practicing the method disclosed in application for Letters Patent of the United States Serial No. 675,375, filed June 12, 1933, in the name of `Harold L. Sawyer.

Sawyer method to be practiced With dispatch and to enable similar shaping and pressing operations tobe performed upon shoe parts, particularly upon closed shoe uppers before they are lasted.

Features of the invention consist in a timing device for insuring that the work will remain under pressure for a predetermined time after the pressure is applied andfor causing release of the pressure after that period of time has elapsed. There are provided in the illustrated machine means for effecting relative approach of the form and presser member, means for locking them in operative position against separation,rmeans for applying fluid pressure to the work to cause all parts thereof to be held against the form with uniform pressure, and means for setting the timing device so that after a predetermined time has elapsed the pressure will be released. In the illustrated machine, a single operating member, for example a trcadle, is arranged to cause the above operations to be effected in the order named. The illustrated machine is duplex and means is provided, as a further feature of the invention, for connecting the operating member `with the two sides of the machine alternately.

These and other features of the invention will now be more particularly described with reference to the accompanying drawings and will be pointed out in the appended claims.

Inthe drawings,

Fig. 1 is a perspective view of the upper portion of a machine embodying the present invention;

Fig. 2 is a side elevation of the machine, partly in section, with the parts in inoperative position;

Fig. 3 is a ViewY similar to Fig. 2 with the parts in operativeposition;

Fig. 4 is a perspective View, taken from the rear, of parts shown at the left of Fig. 1;

Fig. 5 is a transverse section of one of the upper shaping and heating devices with which the machine Vis equipped taken on the line V--V of Fig. 3 while the work is being operated upon;

Fig. 6 is a perspective detail of treadle-operated mechanism shown in Figs. 2 and 3; 5

Figs. '7 and 8 are details in plan, partly in section, showing the treadle-operating mechanism in different positions; and

Fig. 9 is a perspective view, partly broken away, of a shoe upper before it has been operated upon 10 by the machine.

The illustrated machine for shaping the vamp portions of shoe uppers over a heated form to cause activation of thermoplastic cement on the lining and cause it to adhere to the upper comprises a frame la upon which are mounted two heated forms i2, it with which presser members i5, i8respective1y, cooperate. Each of the forms i2, ifi' is approximately semi-cylindrical in outer contour and has a curvature somewhat less than that which an upper is made to assume when worked into lasted position upon a last. Each of the forms i 2, M is provided with an electric heating unit 20, as shown in Fig. 5, the terminals of the units leading to junction boxes 22, 2d from which 25 a cable 2t leads to an outlet box 28, to the door of which is secured a switch 3E! for controlling the supply of current to the heating elements 2li. In front of each heated form is an insulated guard 3l to protect the operator. 30

The illustrated machine is intended to operate upon closed shoe uppers, such as that indicated at A in Fig. 9, before they are assembled upon therlast preparatory to lasting, the lining B or doubler or both being of woven fabric having a napped surface upon the fibers of which are discrete particles of thermoplastic adhesive, the lining and/or doubler material being preferably prepared in accordance with the method disclosed in Letters Patent of the United States No. 1,931,612, granted October 24, 1933, on an application filed in the name of Henry Kahlmeyer. The vamp portion of such shoe upper is placed upon the form l2 and the presser member i6 operated to conform the upper to the shape of the form I2 and to press it thereupon for a predetermined time and then release it.

The construction of the presser member i3, as disclosed in Figs. 1, 2, 3 and 5, comprises a casting having rearwardly extending portions 32 piv- 50 oted on ,a shaftfl and having its front lower surface concave, as shown in Fig. 5. The presser member iS extends forwardly along the two sides of the vamp but is open over the throat of the vamp so that pressure will not be applied to that portion of the upper. Preferably, also, the toe portion of the vamp extends rearwardly beyond the form l2, it being undesirable to stick that portion of the upper and lining together since these layers must later be separated to introduce the toe stiiener; that is, the presser member i6 is shaped to apply pressure to that portion of the upper between the tip line and the throat and along the sides from the tip line rearwardly as far as the vamp extends. Inside the concave portion of the presser member i is iitted a rubber pad or bag 35, the pad 36 being connected by a nipple 35 to a pipe 55 and having in its edge faces groo es which interlock with projecting ribs d2 on the presser member i6 as shown. Preferably the ini'iatable rubber pad 36 is covered by a layer of felt lili which is brought around the edge of the presser member it and secured thereto by clips i5 attached to the presser member I6 by screws 58.

The operator, after placing a shoe upper on the form i 2 with its tip portion projecting rearwardly beyond the end of the form as shown in Fig. 3, operates a treadle 53 which first causes the presser member i5 to be moved downwardly about its axis 35i into cooperative relation to the form I2,

causes the form to be locked in that position, and

then forces fluid such as water through the pipe i5 to inflate the rubber pad 3.

The treadle 55 is connected at 52 to an upright member 54% pivoted on a shaft 55 to a depending portion 58 of the frame ifi, the frame being supported, as shown in Figs. 2 and 3, on a suitable bench or table. The treadle 55 is provided with opposed lugs 52 which embrace a portion of the lower end oi the member 54 and are each provided with a screw 55.1 by adjustment of which the angular relation of the treadle 55 to the upright 555 may be varied to suit the operator. The treadle 50 has a rearward extension 56 which carries a counterweight E58. The counterweight serves to return the treadle 5! and the mechanism operated thereby to the position shown in Fig. 2 after it is swung rearwardly about the pivot by the operator. To each of the presser members i5 is attached a bracket 'i5 which extends rearwardly of the shaft 35 and carries a counterweight 'l2 suspended therefrom by a rod or wire ld. On one side of the upright member 54 an angle lever is pivoted on the same shaft 55. One arm 'i5 of the angle lever isnormally nearly vertical (Fig. 2) and the other arm 'i8 extends rearwardly. The angle lever has on opposite sides of its pivot 55 threaded ears 85, 82 in each of which is a screw BQ, said screws being arranged for alternate contact with the depending portion 5S of the frame I9 adjustably to limit the swinging movement of the angle lever i6, '|8. On the opposite side oi the upright 54 a similar angle lever 85, S8 is mounted and mechanism is provided tocause movement of the treadle to operate these two angle levers alternately.

For this purpose, the upright member 54 is provided substantially midway of its ends with a transversely sliding bolt 95 which, for the sake of lightness, is made hollow. This bolt may be projected to the operators left (Fig. 7) so that movement or the upright 58 by the treadle will cause the bolt 55 to engage the angle lever arm iii, or it may be projected toward the right (Fig. 8) to cause it to engage the angle lever arm 86.

To cause the bolt 5G to be projected alternately to the left and right of the upright 54, mechanism shown in Figs. 2, 3, 6, 'l and 8 is provided. Depending from the under side of the frame lil are two shafts 92, 95. Upon the lower end of the shaft 92 is mounted a lever 95 and upon the lower end of the shaft 94 is mounted a lever 96. The rear ends or the levers 95, 9S are connected by a link 58 which has between its ends a forwardly and rearwardly extending slot l, the slot being open at its front end and being engaged by a sleeve |52 mounted on a pin |54 carried by an arm |95 pivoted at |58 to a rearward projection IE5 of the upright 54. Also pivoted at |65 is a forwardly extending arm H2 having its end bifurcated to receive the bolt 9i) to the middle of which it is pivoted at H4. Between a pin H5 on the arm |05 and a pin H8 on the arm ||2 is arranged a tension spring |25. With the parts in the position shown in Fig. '7 it will be seen that a line connecting the pins ||6 and I8 falls to the left of the pivot |58 and that hence the pull of the spring E25 tends to hold the bolt 95 at the limit of its movement toward the left. As the slotted link 3B is moved toward the position shown in Fig. 8, the arm 55 is swung rst into alinement with the arm i2 and then beyond such alinement so that the pull of the spring |25 is transferred to the right of the pivot |08, thus causing the bolt S5 to be shot suddenly to the right to the position shown in Fig. 8, in which position, upon the next operation of the upright 54 by the treadle, the bolt will engage the arm 86 of the right-hand angle lever and not the arm 'i6 of the left-hand angle lever. To shift the slotted link 98 alternately to right and left, the levers 95, have short, forwardly projecting arms upon each of which is a roll |22. When the treadle is operated with the bolt 90 in the position shown in Fig. 7, the bolt engages the arm HB upon which is a cam surface |26 which engages the roll |22 on the lever 95 and swings the lever clockwise, throwing the slotted plate 98 to the right, as shown in Fig. 8, thus shifting the bolt 55 to the right. When the treadle is next operated, the bolt 55 will engage the arm 96 of the right-hand bell-crank lever which has a cam surface 25 which engages the roll |22 on the lever 55, causing it to turn counterclockwise to shift the slotted plate 5S back to its original position and shl't the bolt 95 to the left. To limit movements of the levers S5, 56, there is on the shaft S2 a collar |28 having a downwardly projecting pin |35 which, by rotation of the collar, is brought into position to arrest the lever 95 in its counterclockwise movement so that its roll E22 will be in position to engage the cam |24. The collar 28 is held on the shaft by a set screw |32, A similar construction is provided for the lever 95 to limit its clockwise movement.

Operation of the mechanism at the left-hand side of the machine is derived from movement of the bell-crank lever it, 'E8 in the manner described, and operation of the right-hand side of the machine is derived from similar operation of the bell-crank lever 86, B8.

The mechanism for operating the left-hand side of the machine will now be described, it being understood that the mechanism for operating the right-hand side ci the machine is similar and is similarly operated by a movement of the bellcrank lever 86, 38, the parts of the two sides of the machine being arranged in bilateral symmetry with respect to a vertical plane located between the two sides and extending from front to rear. The link i458 (Figs. 2 and 3) connects the arm 'ES to an arm |132 of a rock shaft |44 upon which is an upwardly extending arm |46 carrying a pin M3 which engages a slot |49 (Fig. 75

4) in the rear end of a link |56'which, atits forward end', ispivot'ed to a link |52'. The forward end ofthe link |52 is pivoted'at |54 to 'the presser member 32 at a poiritsomewhaltabove its pivot 34. The links |56, |52 constitute a toggle and the link |52 has a `rearward projection |56 which engages thelink |'56 'when the toggle is straightened and prevents its being broken in a downward direction but vpermits it to be broken upwardly. 'supposing `the toggle to beinthe position shown'in Fig. 2 and the bell crank 16, 16 to be operated, the arm |42, |46 will be moved clockwise and the arm |46 will push Aon the straight toggle |56, |52 to move the presser member I6 intooperative position, the counterweight 12 being raised.

To lock the presser member I6 in operative position, a portion of the presser member 32 extends rearwardly of its pivot 34 and has pivoted thereto'at |56 a locking lever |66 the lower end of which has two notches `to engage a block |62. When thepresser member I6 is in raised position, the upper notch engages the block |62 and when the presser member is lowered the lower "L notch engages the block and locks the presser member in operative position. To the upper end of the locking lever |66 is pivoted a rod |64 the rear endof which slides through an ear |66 on the-arm |46. On the rod |64 rearwardly of the ear |66Uis a lock nut |61 (Fig. 4) and-between the ear :and the locking lever |66 is a compression spring |68 which, as ithe arm |46 4moves clockwise, is compressed and tends to move the locking lever |66 into locking Vengagement with the :block |62.

During the described movement of the presser member |6 into operative position there is mutual approaching movement 4between the middle jointof-ithe toggle |56, |52 and a screw |16 threaded into the rear end of the bracket `16.so that, after the locking lever |66 has been raised far `enough for the lower notch in its lower end to engage the block |62, the screw |16 will engage the toggle |56, |52 and break it upwardly, .as shown inr Fig. 3, thus free- .ing the arm |46 for further clockwisemovement,

which only serves, so far as the parts described are concerned, tol apply further tension to the spring |64 which tends more firmly to hold the locking lever l66 in locking-position.

This movement ofthe rock shaft |44 isiutilized to `inflate the rubber pad 36 of the locked presser member I6. Extending downwardly from the rock shaft |44 (Fig. 2) is an arm |12 the lower end of which is connected by a link |14.to a horizontally reciprocating shaft |16-the front portion of which is guided in a hole-in the base I6 and the rear end of which is connected to a piston |18 arranged in a cylinder |86. The-frame I6 is formedas a tank surrounding the cylinder |86 and is lled with a liquid, for example water. In the piston |18,is a one-way valve I8I which allows liquidto flow into the cylinder but not out of it. As the piston |18 is pushed to the left by clockwise swinging movement of the arm |12,

" water will be forced through a check valve |82 through a flexible pipe |84 connected to the pipe l46 which communicates with the inflatable pad 36. Thus, after the pressing member is lowered and locked, fluid under pressure is forcedV into the'inatable pad 36 to cause the required presp sure tov be applied to the work to shape it over the heated form l2 and cause the cement to be activated so that the parts will adhere. Although movement of the piston |18to the left begins vwiththe downward" movement of the fpresser be relieved andthe parts returned to normal posilOl tion, the operator in the meantime having introduced an upper into the mechanism at the righth'and side of the machine and moved the treadle to cause that side of the machine to operate. A I pipe |86 Vcommunicating with the iniiatable pad l?) V36 is connected byV a flexible tube |86` (Fig. l) "to a valve chamber |96 (Fg. 3). In the-upper'portion of the chamber |66 is an opening'closed bya valve |62A which is held in closed ApositionY by a spring F64 the tension of which may be adjusted 251' by a threaded sleeve |66. This spring is set for thepressure (in the neighborhood of ten pounds) which it is desired to apply to the work and, *if pressure in'excess of that is applied, the spring will yield and allow pressure in excess of that rei 23 quired to be relieved. The valve |62 has a stem |98 Vconnected to a lever 266 fulcrumed at`262 to the frame. The lever has a forward extension 264 for hand manipulation and at its rear end has plv'- oted thereto'a depending rod 266 the lower end `of 36' which is threaded to receive adjustable lock nuts 268, vthe lower threaded end of the rod ybeing guided in an upwardly projecting sleeve 2|6-pivloted to the front end of a lever 2|'2 which is iflcrumed between its ends at 2|4 on a bracket 2|6 35 secured to the frame |6. As best shown in Fig. 4, the lever 2|2 has a depending arm l2||l offset therefrom, which arm has pivoted thereon a. block 226 arranged to slide in a slot 222 formed in'a link 224 pivoted at 226 to a short arm 226 on the 'i rock shaft |44. On the link 224 ispivoted'at2l36 a pawl 232 (Fig. 3) which is held by a spring f 2134 in position to engage the block 226. Connectedt'o the pawl above its pivot 236 is a rod 236'which 'passes'through an ear formed in the end of` the 5545 rock shaft |44 and carries an adjustable collar 2:38 which, by engagement with the ear, lifts the pawl 232 for a purpose to be later explained. The rear end of the lever 2|2 is connected by`a1ink-246 to arod 242 fixedly secured to a cylindrical weight-50 244 guided for vertical movement in a cylinder 246 formedl in the frame |6. Below the weight 244 and fixed thereto is la smaller cylindrical portion 256 forming a piston'which reciprocates substanf tially fluid tight in a cylindrical recess or cy1in-*55 der 252 formed in the frame and communicating with the water in the tank by a passage 254 provided with a strainer 255. At thefbottcm of the cylinder 252 is a leak valve 256 through which A fluid from the cylinder 252 may pass through the W passage-254 to the tank. The valve 256 has a disklike'head and a reduced fluted body portion which fits loosely in a vvertical portion of lthe passage 254 and rests on an adjusting screw 258 by which it may be rais-ed or lowered to vary the distance '65 between its head and the bottom of the cylinder 4252 and thus vary the rate of passage of liquid from the cylinder 252 to the tank. To `prevent the leak valve 256 from being thrown out of posiu tion bythe rush of water into the cylinder 252170 when the piston 256 is raised, a stem 251 is connected thereto at the center of its head and extends into a hole bored centrally of the piston 256.

The cylindrical weight 244 is only tight enough in its cylinder `246 tobeproperlyguided'thereby but in order that the descent of the weight may be controlled by the piston 250 a relatively large port 25| in the cylinder is provided which communicates with the tank and allows water to flow substantially freely into and out of the cylinder 246. This prevents any dash-pot action of the weight 244 and avoids interference with the action of the piston 256. In order that any liquid which gets above the weight 244 may return to the tank, a port 253 is provided which is located just above the piston when it is in its lowest position.

During the movement of the treadle 50 from the position shown in Fig. 2 to the position shown in Fig. 3, the presser member I6 will be lowered by the toggle |56, |52, locked by the lever |66 and the piston I'I8 moved to inlatethe bag 36 and apply the desired pressure to the shoe upper, the amount of pressure being indicated by a pressure gage 269 and the pressure being limited and maintained by the setting of the spring-pressed valve |92. Also, by the simultaneous rearward movement of the arm 228 (Fig. 4) the link 224 will be moved rearwardly while the pawl 232 is in engagement with the block 22D, thus causing the arm 2I8 to swing rearwardly and to raise the rearwardly extending arm of the lever 2 I2, thereby raising the cylindrical weight 244 and the piston 250 and allowing liquid to pass from the tank into the cylinder 252 beneath the piston. During this movement the sleeve ZID on the forwardly extending arm of the lever 2I2 will move downwardly on the threaded portion of the rod 226 away from the nuts 208. Near the end of the rearward movement of Vthetreadle the collar 238 (Fig. 3) on the rod 236 will engage the ear on the rock shaft |44 through which the rod passes, thus arresting movement of the pawl 232 and causing it to be lifted away from the block 226, thus freeing the lever 2|2 from the treadle and placing it under the influence of the weight 244 which then begins to descend. Its rate of descent, however, is controlled by the passage of the liquid from the cylinder 252 through the leak valve 256, this valve being set for the screw 258 to cause the required number of seconds to be consumed by the descent of the piston 256. As the piston approaches the lower end of its movement the sleeve 2 I 6 will, in its corresponding upward movement, engage the nuts 208 on the rod 206 and operate the lever 206 to lift the valve |92, thus releasing the pressure in the bag 36 on that side of the machine. The liquid which passes through the valve |92 is conducted back to the tank by a tube |93.

After operation of the treadle 58 the operator will release it, whereupon it will be returned by the weight 68 to its normal position and the bolt will be shifted into position to engage the bell crank 86, 88 upon its next operation, The bell crank '|6, 18, which has just been operated, now returns, which it tends to do due to the weight of the parts. The toggle |58, $52 will rst be straightened and while the pin |48 is moving in the slot |49 the ear |66 will engage the nut I6`I on the rod I 64. When the pressure in the pad 36 is released by the opening of the valve |92, the pull on the rod will move the locking lever |60 to release the notch in its lower end from the block |62, whereupon the weight 'I2 will lift the presser member. When the angle lever i6, 'I8 and the parts connected thereto reach their initial positions, the pawl 232 will reengage the block 220 ready for the next operation.

During the dwell of the presser member I6 upon the work placed upon the form I2, another piece of work will be placed upon the form I4 and the presser member I8 operated by another movement of the treadle, at which time the treadle will, in the manner described, operate the bell crank 86, 88 which, through mechanism similar to that already described for operating the member I6 on the left-hand side of the machine, will operate the presser member I8 on the right-hand side.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. A machine for pressing shoe upper parts having, in combination, a form having the shape it is desired to impart to the inner face of a shoe upper part, a presser member movable into and out of cooperative relation to the form to shape the upper part to the form, means for applying pressure to the shoe upper part located between the presser member and the form, and means for releasing the pressure after a predetermined time has elasped.

2. In a machine for pressing shoe upper parts, the combination of a form having a convex operating face, means for electrically heating the form, a presser member movable toward and from the convex face of the form, a layer of felt covering the operative face of the presser member, means for bringing the presser member into cooperative relation with the form with a shoe upper part between them and applying pressure to the shoe upper part to shape the upper part over the form, and means for relieving the pressure after it has been applied for a predetermined period.

3. A machine for pressing shoe parts having, in combination, relatively movable members between which an upper is to be shaped, an inatable pad between one of said members and the work, a cylinder and piston arranged for relative operation to force fluid into the pad, a single manually operated lever, means including a toggie connected between said lever and one of the shaping members whereby relative movement of said shaping members is effected, and connections from said lever for effecting relative operation of the cylinder and piston.

4. A machine for pressing shoe parts having, in combination, relatively movable members between which an upper is to be shaped, an inflatable pad between one of said members and the work, a cylinder and piston arranged for relative operation to force iluid into the pad, a single operating lever, means including a toggle connected between said lever and one of the shaping members whereby relative movement of said shaping members is effected, a latch rendered operative by movement of the lever for maintaining the shaping members in operative relation to each other, and connections from said lever for effecting relative operation of the cylinder and piston to cause the inflation of the pad.

5. A machine for pressing shoe parts having, in combination, relatively movable members between which an upper is to be shaped, an inflatable pad between one of said members and the work, a cylinder and piston arranged for relative operation to force iluid into the pad, a single operating lever, means including a toggle connected between said lever and one of the shaping members whereby relative movement of said shaping members is eiected, a latch for maintaining the shaping members in operative rela- 75 tion, means for breaking the toggle after the latch is engaged to permit further movement of the lever, and connections from'said lever for effectingv relative operation of the cylinder and piston.

6. A machine for pressing shoe parts having, in combination, a form having the shape it is desiredto impart tothe inner face of a shoe part, a member movablev into and out of cooperative relation to the form, said member carrying an inilatable pad by iniiation of which pressure is applied to shape the shoe part to the form, and a device for releasing vthe pressure in the pad after a predetermined time has elapsed.

7. A machine for pressing shoe parts having, in combination,` a form having the shape it is desired to impart to the inner face of a shoe part, a member movable into and out of cooperative relation to the form, said member carrying an inflatable pad by inflation of which pressure is applied 'to shape the shoe part to the form, a valve for limiting the pressure applied to the pad, and a device for releasing the pressure in the pad afterfa predetermined time has clasped.

SAA-machine for pressing shoe parts having, in lcmbin'ation, relatively movable members between which an upper is to be shaped, an inflatblepad between one of said members and the workya single operating means acting successii/"elyt-A cause relative approach of said membeis,rr to cause locking of the members against separation and to force iiuid into the pad to apply pressure to the work, and a timing device for releasing the pressure after it has been applied for a predetermined time.

9."A machine for pressing shoe parts having, in combination, a form having the shape it is desired to impart to the inner face of a shoe part, a member'movable into and out of cooperative relation to the form, said member ucarryingV an inatable 'pad by inflation of which pressure is applied to shape the shoe part to the form, a valve for maintaining pressure in the pad, a cylinder, ay Weighted piston` in the cylinder, and connections therefrom to the valve for opening the valve at apredetermined point in the descent of the piston.

10'.A machine forv pressing shoe parts having, inV combination, a form, means for electrically heating the forma presser member movable toward and` from the form, a liquid-containing pad lining the presser member, means for moving the presser member toward the form to bring it into operative relation to work pressed between the form and the pad, means for holding the 'presser member in operative position, means for forcing liqui'dinto the pad under predetermined pressure, andmeansfor automatically releasing the pressure after a predetermined time has elapsed. 11. Amachine for pressing shoe parts having, ncombination, a form having the shape it is desired to impart to the inner face of a shoe part, afinembermovable into and out of cooperative relation 'tothe' form', said member carrying an inflatablepadby inflation of which pressure is applied to shape the shoe part to the form, a valve for maintaining pressure in the pad, a cylinder, a weighted piston in the cylinder, connections therefrom to the `valve for opening the valve `atV a `-predetermined point in the descent of the piston, and a leak valve for controllingV `the descent of the piston.

, 12. A machine for pressing shoe parts having,

in ,combination, a form, means for electrically heating the form, a presser member movable toward and from the form, a rubber pad lining the presser member, means for moving the presser member toward the form to bring it into operative relation to work pressed between the form and the pad, means for locking the presser member in operative position, means for vforcing liquid into the pad under predetermined pressure, and means for maintaining the pressure for a predetermined time after its application and then releasing the pressure. g

13. A machine for pressing shoe parts having, in combination, a form having the shape it is desired to impart to the inner face of a shoe part, a member movable into and out of cooperative relation to the form, said member carrying an inflatable pad by inflation of which pressure is applied to shape the shoe part to the form, a valve for maintaining pressure in the p-ad, a cylinder, a weighted piston in the cylinder, connections therefrom to the valve for opening the valve at a predetermined point in the descent of the piston, and a leak valve in the cylinder for controlling the movement of the piston.

14. A machine for shaping and securing t0- gether layers of material having between them thermoplastic cement comprising a convex heated form to receive the layers of material, a rigid presser member complementary to the form, means for moving the presser member toward the form, means for locking the presser member in operative position, an inflatable pad between the presser member and the form for pressing the layers of material against the form, and manually operated means for inflating the pad.

15. A machine for treating the vamp portion of a multi-ply shoe upper having thermoplastic cement between the plies comprising a formhaving a curvature less than that which the vamp will have when lasted, a. presser member complementary to the form, means for effecting relative approaching movement between the presser member and the form, means for locking the presser member and form against separation, inflatable means `backed by the presser member for pressing the vamp against the form, and means for forcing fluid into the inflatable means to apply pressure to the vamp.

1G. A machine for shaping and securing together layers of material having between them thermoplastic cement comprising a convex heated form to receive the layers of material, a presser member complementary to the form, a straightened toggle for moving the presser member toward the form, means for locking the presser member in operative position, means for breaking the toggle after the presser member is locked, an inflatable pad between the presser member and the form, and means for thereafter forcing liquid into the pad.

17. A machine for treating the vamp portion of a multi-ply Yshoe upper having thermoplastic cement between the plies comprising a heated form having a shape to impart a preliminary curvature to the vamp, a presser member cornplementary to the form, means for effecting relative approaching movement between the presser member and the form, means for locking the presser member and form against separation, inflatable means backed by the presser member for pressing the vamp against the form, and means for releasing the pressureafter the pressure has been applied for a predetermined period.

g 18. A machine for pressingshoe parts having,

in combination, relatively movable members between which an upper is to be shaped, an inflatable pad between one of said members and the work, and a single operating means acting successively to cause relative approach of said members, to cause locking of the members against separation, to force fluid into the pad to apply pressure to the work and to set a timing device by which the pressure is automatically released after the lapse of a predetermined period.

19. A machine for shaping and securing together layers of material having between them thermoplastic cement comprising a convex heated form to receive the layers of material, a rigid presser member complementary to the form, means for moving the presser member toward the form,l means for locking the presser member in operative position, an inatable pad between the presser member and the form for pressing the layers of material against the form, a cylinder and piston for forcing fluid into the pad, and a manually operated treadle for operating the piston.

20. A machine for treating the vamp portion of a multi-ply shoe upper having thermoplastic cement between the plies comprising a form having a curvature less than that which the vamp will have when lasted, a presser member complementary to the form, means for eiecting relative approaching movement between the presser member and the form, means for preventing separation of the presser member and form, inflatable means backed by the presser member for pressing the vamp against the form, a cylinder and piston for forcing uid into the inatable means to apply pressure to the vamp, and means for operating said piston.

21. A machine for shaping and securing together layers of material having between them thermoplastic cement comprising a convex heated form to receive the layers of material, a presser member complementary to the form, a straightened toggle for moving the presser member toward the form, means for locking the presser member in operative position, means for breaking the toggle after the presser member is locked, an inflatable pad between the presser member and the form, and a piston operating in a cylinder for thereafter forcing liquid into the pad.

22. A machine for treating the vamp portion of a multi-ply shoe upper having thermoplastic cement between the plies comprising a heated form having a shape to impart a preliminary curvature to the vamp, a presser member complementary to the form, means for effecting relative approaching movement between the presser member and the form, and locking the presser member and form against separation, an inflatable pad backed by the presser member for pressing the Vamp against the form, means for forcing uid under pressure into said pad, and means for releasing the pressure after the pressure has been applied for a predetermined period.

23. A machine for pressing shoe parts having, in combination, relatively movable members between which an upper is to be shaped, an inflatable pad between one of said members and the work, a cylinder and piston arranged to force Huid into the pad, and a single operating means acting successively to cause relative approach of said members, to cause locking of the members against separation, to operate the piston to force fluid into the pad to apply pressure to the work and to set a timing device by which the pressure is automatically released after the lapse of a predetermined period.

24. A machine for pressing shoe parts having, in combination, relatively movable members between which an upper is to be shaped, an inflaiable pad between one of said members and the work, a cylinder and piston arranged for relative movement to cause fluid to be forced into the pad, and a single manually operated means acting successively to cause relative approach of said members, to prevent separation of the members and to effect relative movement of the cylinder and piston to force uid into the pad to apply pressure to the work.

25. In a machine for shaping and pressing shoe uppers, the combination of a pair of forms, a pair of presser members cooperating with the forms, a single operating lever, a pair of levers one connected to each presser member, and means for connecting the operating lever rst to the lever connected to one of the presser members and then to the lever connected to the other presser member.

26. In a machine for shaping and pressing shoe uppers, the c-ombination of a pair of forms, a pair of presser members cooperating with the forms, a single operating lever, a pair of angle levers located one on each side of the operating lever, connect-ions from one angle lever to one of the presser members, connections from the other angle lever to the other presser member, a bolt arranged to slide transversely of the operating lever into a position to engage either one of the angle levers, and means operated by the angle levers for rst locating the bolt in position to engage one angle lever and then into position to engage the other angle lever.

27. In a machine for shaping and pressing shoe uppers, the combination of a pair of forms, a presser member cooperating with each form, an inflatable pad on each presser member, a single operating lever, a pair of angle levers located one on each side of the operating lever with one arm of each adjacent thereto, connections from each angle lever to one of the presser members whereby operation of the angle lever moves the presser member toward its form, locks it in operative position and forces uid into the pad to apply pressure to the form, means for predetermining the amount of pressure applied, and means for connecting the operating lever alternately to the adjacent arms of the angle levers so that the presser members will be operated alternately.

28. In a machine for shaping and pressing shoe uppers, the combination of a pair of forms, a presser member cooperating with each form, an inflatable pad on each presser member, a single operating lever, a pair of angle levers located one on each side of the operating lever with one arm of each adjacent thereto, connections from each angle lever to one of the presser members whereby operation of the angle lever moves the presser member toward its form, locks it in operative position and forces fluid into the pad to apply pressure to the form, means for connecting the operating lever alternately to the adjacent arms of the angle levers so that the presser members will be operated alternately, and means for releasing the iluid pressure in each pad after the pressure has been maintained for a predetermined time.

29. In a machine for shaping and pressing shoe uppers, the combination of a pair of heated convex forms, a presser member cooperating with each form, an inflatable pad on each presser member, a single operating lever, a pair of angle levers located one on each side of the operating lever with one arm of each adjacent thereto,

connections from each angle lever to one of the presser members whereby operation of the angle lever moves the presser member toward its form,

locks it in operative position and forces fluid into the pad to apply pressure to the form, and means for connecting the operating lever alternately to the adjacent arms of the angle levers so that the presser members will be operated alternately.

SIDNEY J. FINN. 

